Jack



Sept. is, 1925. 1,554,120

I. S. MOSHER JACK Filed Decv 18, 1920 4 Sheets-Sheet 1 55 17M ,5. Moan:v INVENTOR ATTORN EY Sept. 15, 1925. 1,554,120

- l. 5. MOSHER JACK Filed Dec. 18, 1920 4 Sheets-Sheet 2 INVENTOR IRA.flaw/Eli.

Sept. 15, 1925. 1,554,120

- l. S. MOSHER JACK Filed 1 1920 4 Sheets-Sheet 3 4 1 1 I p I T ilulu/IIQII.

[NV EN? OH H ATTORNEY fla 8 a v J V m v z n i f f a H/H If? ,5. Mas/wit.

L MQSHER JACK 4 sheet 4 Filed Dec. 18.

NV TOR AITORNEY Patented Sept. 15, 1925.

UNITED STATES IRA s. MOSHER, or oIIIcAeo, ILLINOIS,

PATENT OFFICE.

'ASSIGNOR TO MOSHER MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, ACOPAR'INERSHIP COMPOSED .OF FREDERICK T.

BARRETT AND IRA S. MO'SHER.

JACK.

To all whom it may concern. r 7

Be it known that I, IRAS. MosI-IER, a citizen of the United States,residin at Chicatransported, and a jack which is go, in the county ofCook and tate of Illinois, have invented new and useful Improvements inJacks, of which the following is a specification.

This invention relates to lifting jacks, and an object of the inventionis to provide a lifting jack of comparatively great lifting power whichmay be assembled in a compact form to permit it to be convenientlyparticularly designed for use by motorists.

Another object of the invention is to provide, a jack structureembodying a supporting member which is movable independently ofandre'lative to its raisingmeans to per mit quick adjustment of thesupporting means to engage the article to be raised, and also toprovide'means for holding the supporting means in adjusted positionrelative to its raising means, i the latter means remaining in itslowermost normal position during independent adjustment of the support.

A further, object of the invention is to provide a lifting jackstructure wherein interengaging ribs are provided on the supportingmember and its raising means to prevent transmission of tilting strainto the raising means and consequently permitting of the free operationof the raising means.

Other objects of the invent-ion willappear in the following detaileddescription and accompanying drawings wherein:

Fig. 1 is a side elevation of the improved lifting jack.

Fig. 2 is a side elevation of the lifting jack having parts broken awayto illustrate the gearing for operating the lifting means.

Fig. 3 is a vertical section lifting ack.

Fig. 4 is a horizontal section through the lifting jack, takenfon line4-4 of Fig. 3.

Fig. 5 is. aneolged elevation of the lifting jack. 1

Fig. 6 is a side elevation of the raising member.

Fig. 7 is a detailed sectional view through :the gear operatingmechanism.

Fig. 8 is aside elevation of a handle used in the pe atin mec nism.

through the Fig. 9 is a crosssection through the handle taken on line9-9 of Fig. 8.

Fig.10 is; a face view of the pawl employed for holding thesupporting'm'ember in adjusted positions relative to its raism means. V

-Fig. 11 is a longitudinal section through the pawl taken on line1111 ofFig. 10.

Fig. 12 is a detailed edge elevation of the supporting member.

Figl 13 is a fragmentary section through the supporting memberillustrating the manner of nesting the operating handle therein and themeans. for holding the handle against accidental movement. Fig. 14 is anedge elevation of the raising member.

Referring more particulary to the drawing, the improved lifting jackcomprises a main supporting body 1 which is provided with a verticallongitudinal extending openh1g2 that receivestherein the raising sleeve3. The raising sleeve 3 is substantially rectangular in shapein crosssection and has its outer side split longitudinally, through which theconnecting portion 4 of the supporting member 5 extends. The connectingportion 4 has itsinner edge connected to a substantially rectangularsleeve 6 which is slidably mountedwithin the sleeveB while its outeredge is connected to the extension 7 which provides the shelf 8 uponwhich the article to be raised rests. This connecting portion 4 is intheform of a web, and is shorter than the rectangular body 6. The extension7 is provided with a transversely extending opening 9 in which a pin 10is mounted. The pin 10 rockably supports the pawl 11, the saidpawlbeingrelatively wide and provided witha cutout portion 12to receive theextensionlltherein; The lower end of the pawl 11 curves inwardlytowardsthe axis of thesleeves 3 and'6 and has its inner lower edgerounded as shown: at 13 for engagement in any aligning pair of notches14 formed between the teeth 15 of the rack structures 16. The rackstructures 16 are formed upon the raising sleeve 8 and. are spaced, asclearly shown in Fig. 14 of the drawings, to permit the unimpededpassage of the connecting portion 4 therebetween. The sleeve 6 andconsequently the supporting member, of which thissleeve is a part,-

are li ly a a e relative to t e a n sleeve 3, sons to'pcrmit thesiipportingniemo her to be raised or lowered independently of theoperation of the raising sleeve 3 to per; "mit-properje'ngagement of theshelf 8 against operation of the raising sleeve 3. During the relativemovement of the supporting member of which the connecting portion' l isa p 'p llism aupon its r ve 10 10 out of the aligning pair of notches14,

U and after the supportingv member has,- been properly adjusted"'so,that the shelf 8 will engage beneath the article to be raised the pawl11 is swung inwardly so that it will 15 engage in the1properlyaligning;notcliesf14 and the pawl 11 will connect the supporting member5 and theraising sleeve 3 forsynchronous movement. p h

The aisin l e e 8ciisar d wi gear rack 17 extending longitudinallyalongthe-side opposite to the racks 16 :as clearly shown in Fig. 6 ofthedrawings. The teeth a 18 of the-rack 17 mesh with the peripheralteethj19-of the gear-20. The gear 2 0has a trunnion :2l for me.dintegrally therewith a :which rotatablyengages in-a suitablebearing 22formedin the housing lxof vthe jack. structure, as clearly shown. inFig.A of the drawing, The gear-20has a bearing sleeve 23 formed; integrallygtherewith which is vslightly.larger in ili'anleter than the gear 20 andwhich snugly-fits within the bearing 24.

formed inthe housing 1. The worm gear pof greater diameter, than'thegear 20, 1s formedintegrally upon the outer endflof the sleeve 23.Aaworin .26isniounted uponthe sha ear b il f Ices? a 1 d me h s .o w tthe W m B bear n s J are carried by the worm 26 to absorb under 4othrust, of the worm 26 consequently relievethe friction.whiqhinight beoccasioned during, the IQtQlJIOH Q f the worm. The worm gear25 and worm2 6 are encl e d in. a suitb e a s em dial-i o edy removableciisingsccfion 30, loy means of .whiclraccess-tb the -gears is obtainedwhen,

n ess y V 1: 1

, The shaft'f2 7 has aiiratc lhet -31 keyed thereon about which ahousing 52 is mounted, the latter housingbeingrotatable upon the shaft27, and. provided with aQpair. of rotating @1118 sam peiaaiib'w ani abewBawls: 34 .are piv- L axis of tho shaft :2 J V I l l y r ie-d, by the.amas I n n of r 5" tliese pawls is adapted; to engagejth ratchet teeth'of the fat? hetf3 1 at'f'a time to rotate H tqiie 'y l h gi ylniovement r thejim sing i poiigth evliaft 27, 'h i gi32x i as6 tiifi'fd fh iifhlgh is aapreu to receive; i'' lend e t an e This handle 36"constructed 1 in aiiy approved m nner, pref embiy hollow I uloiii r asshown iii Figs. ;8 Qotl1ed1awiiigsand it haste knob 37 G5 "on one'eniito acres ahana'gri p. By pivotal movement the handleliiti, which iorms aI H tates the get 11 20 through the worm 2 6 and 6 the articletoberaisedwithoutnecessitating lO andrspringfll may be provided, the setscrew being carried by the connectingportion 4 and having one end of thespringconnectedthereto while :the other end of the spring is connectedtothe pawljll, for ma ntaining the pawl 11 in one out the notches 14:,against accidental movement.

The sleeve 6 is provldd w th longitudi nally extending axial recess 44which proyides a pocket for receiving the' handle 36,

when lthe'latter member is not innlse, to provide a compact- -structurefor theljack which maybe stored in-a relatively small space A set screw45 v is carried by the sleeve 6 andis adapted for biting engage- I mentwith" the handle 36 to hold-it against accidental movement relative' toth'esleeve 6' when thehandleis nested in t'hejpocketfl l. a The body 1is provided; with; vertical ribs 46 which engage in recesses 4?, whichare formed in the raising sleeve 3. The recesses' 4'7 form ribs 48 whichinterengage with the ribs 46, to -,prevcnt the, transmission of. tiltingmovement or strain, to the gear rack 3 17 and consequently to the gear20 .which would increase the work and "decrease ease of OPGIELUOII oftheqaclrstructure If it is so desired, a hand crank 50. may be mountedupon the shaft, ,to permit manual rotation of this shaft: and operationof the raisingsleeve3, This hand crank 50 isparticularly adapted for usewhen only light weights are to be lifted and it will also servead'mirably; in lowering the sleeve 3 into its normalposition From theforegoing description taken in connection with the accompanyingdrawingsit will be apparent that the supporting member 5 may be raised orlowered relative to the raising sleeve 3 to permit the shelf 8 toproperly engage the article to be raised-and also that the raisingsleeve 3 will remain in its lowermost position during such adjustment,thus permitting effective .Workinghse ofthe entire lifting-or raising oflthevraising sleeve 3 and eliminating the tediousoperation of raisingthe support throiighxoperation of the gear 20, to cause it to }pro'perlyengagethetarticle to be raised; V

The forming of the gear 20, trunnion 21,

hearing sleeve 24 and wormgear 25 integral,

provides a relatively strong structurehaving a minimum bearing surfacewhich will maother manners and the parts associated in differentrelations and, therefore, Iv do not desire to be limited in any mannerexcept as set forth in the claims hereunto appended.

Having thus described my invention what I claim is:

1. A jack comprising a body provided with a vertical opening, a sleeveslidably mounted in the opening and having a tongue and grooveconnection with the body, a sec ond sleeve slidably mounted within thefirst sleeve, a shelf extending from the second sleeve, and adjustableconnection between said shelf and the first sleeve, and means forraising the first sleeve.

2. A jack comprising a body provided with a vertical opening, a sleeveslidable in said opening, a second sleeve slidably mounted within saidfirst named sleeve, a transverse shelf on said second sleeve, an aduStable connection between sald shelf and said first named sleeve, andmeans for raising said first named sleeve;

3. A jack comprising a body provided

